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in Heat and Thermodynamics by (48.5k points)
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A flask is filled with 13g of an ideal gas at 27 °C and its temperature is raised to 52 °C. Find the mass of the gas that has to be  released to maintain the temperature of the gas in the flask at 52 °C and the pressure is same as the initial pressure.

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Let n be the initial number of moles and ri be the final number of moles. since pressure and volume remain the same, we have

PV = nRT = nR x 300 = n'R x 325

\(\frac{n'}{n}\) = \(\frac{300}{325}\) = \(\frac{12}{13}\)

Mass to be released = 13 - 12 = 1g

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